舉個例子直接說明，下面是一個學生物件

import java.io.Serializable;
import lombok.Data;
import com.baomidou.mybatisplus.enums.IdType;
import java.math.BigDecimal;
import java.util.Date;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;

@TableName("t_student"
 
)
@Data
public class Student implements Serializable {
    private static final long serialVersionUID = 1L;

        /**id*/
        @TableId(value="id", type= IdType.AUTO)
        private Integer id;
        /**姓名*/
        private String name;
        /**建立時間*/
        private Date cratetime;
        /**學費*/
 

        private BigDecimal xuefei;
        /**年齡*/
        private Integer age;

}

物件要能被序列化必須實現Serializable介面。

序列化

 public static byte[] serialize(Object object) {
        ObjectOutputStream o= null;
        ByteArrayOutputStream b = null;
        try {
            // 序列化
            b = new ByteArrayOutputStream();
            o = new
 
 ObjectOutputStream(b);
            o.writeObject(object);
            byte[] bytes = b.toByteArray();
            return bytes;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

反序列化

 public static Object unserialize(byte[] bytes) {
        ByteArrayInputStream b = null;
        try {
            // 反序列化
            b= new ByteArrayInputStream(bytes);
            ObjectInputStream ois = new ObjectInputStream(b);
            return ois.readObject();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }